Insider Trading activities of Mersana Therapeutics, Inc. (MRSN)

Insider trading activities (stock purchases, sales, and option exercises) reported by insiders of Mersana Therapeutics, Inc. (MRSN) since 2005 are illustrated in Table 1 and Table 2. Table 1 shows the monthly insider trading data of Mersana Therapeutics, Inc. since year 2005. Table 2 shows the detailed insider transactions of Mersana Therapeutics, Inc. since 2005. The reporting company's ticker symbol is MRSN. The reporting company's CIK number is 1442836.
The total value of stock buying since 2005 is $180,000,000.
The total value of stock sales since 2005 is $125,440.
The total value of stock option exercises since 2005 is $154,421.


Table 1. Monthly summaries of insider stock purchases, sales, and option exercises for Mersana Therapeutics, Inc. (MRSN).
Trading Period Insider Buying Insider Sales Option Exercises
year-month Shares Value Shares Value Shares Value
2019-03 7,500,000 $30,000,000 0 $0 0 $0
2018-09 0 $0 3,500 $40,705 3,500 $4,900
2018-08 0 $0 3,500 $46,025 3,500 $26,005
2018-07 0 $0 3,500 $38,710 10,000 $14,000
2018-02 0 $0 0 $0 5,911 $41,258
2018-01 0 $0 0 $0 14,705 $52,320
2017-12 0 $0 0 $0 10,417 $15,938
2017-07 10,000,000 $150,000,000 0 $0 0 $0

Table 2. Detailed insider stock purchases, sales, and option exercises of Mersana Therapeutics, Inc. insiders (MRSN)
  Trade Date   Insider Name Trade Type     Shares       Price ($)   Value ($)
2019-03-05 Sandell Scott D (10% Owner) Buy 3,750,000 4.00 15,000,000
2019-03-05 Mott David M (Director) Buy 3,750,000 4.00 15,000,000
2018-09-24 Lowinger Timothy B (Chief Scientific Officer) Sale 3,500 11.63 40,705
2018-09-24 Lowinger Timothy B (Chief Scientific Officer) Option Ex 3,500 1.40 4,900
2018-08-27 Lowinger Timothy B (Chief Scientific Officer) Sale 3,500 13.15 46,025
2018-08-27 Lowinger Timothy B (Chief Scientific Officer) Option Ex 3,500 7.43 26,005
2018-07-23 Lowinger Timothy B (Chief Scientific Officer) Sale 3,500 11.06 38,710
2018-07-03 Lowinger Timothy B (Chief Scientific Officer) Option Ex 10,000 1.40 14,000
2018-02-21 Lowinger Timothy B (Chief Scientific Officer) Option Ex 5,911 6.98 41,258
2018-01-30 Foster Wayne (Vice President of Finance) Option Ex 14,705 3.56 52,320
2017-12-20 Protopapas Anna (President and CEO) Option Ex 10,417 1.53 15,938
2017-07-03 Florence Anthony A. Jr. (10% Owner) Buy 1,000,000 15.00 15,000,000
2017-07-03 Sonsini Peter W. (10% Owner) Buy 1,000,000 15.00 15,000,000
2017-07-03 Nea 14 Gp, Ltd (10% Owner) Buy 1,000,000 15.00 15,000,000
2017-07-03 Viswanathan Ravi (10% Owner) Buy 1,000,000 15.00 15,000,000
2017-07-03 Baskett Forest (10% Owner) Buy 1,000,000 15.00 15,000,000
2017-07-03 Sandell Scott D (10% Owner) Buy 1,000,000 15.00 15,000,000
2017-07-03 Kerins Patrick J (10% Owner) Buy 1,000,000 15.00 15,000,000
2017-07-03 Mott David M (Director) Buy 1,000,000 15.00 15,000,000
2017-07-03 Barrett M James (10% Owner) Buy 1,000,000 15.00 15,000,000
2017-07-03 Barris Peter J (10% Owner) Buy 1,000,000 15.00 15,000,000

Insider trading activities including stock purchases, stock sales, and option exercises of MRSN listed in the above tables cannot be completely guaranteed as to their accuracy. For more insider trading information of Mersana Therapeutics, Inc. (symbol MRSN, CIK number 1442836) see the Securities and Exchange Commission (SEC) website.